Doorknob



Dec. 8, 1925. 1,564,735

M. W. WE SSENDORF DCORKNOB Filed April 2/7, 1923 I a 3 If/ 54!!! 4 Patented Dec. 8 1925:

, UNITED smmjPA EN-r MARTIN w WESSENDORF, or BUCHANAN, MICHIGANi DOORKNOB. c

Application filed April 2?,

to the latch shaft without the usual fastening screw. 7

The primary object of the invention is to provide a structure by which the door knob may be secured to the shaft and be firmly held so that the knob cannot work loose from its position on the shaft.

Another object of the invention is to provide'a structure of this characterwhichmay be easily disconnected when the knob is to.

be removed. r

Other objectsof the invention will appear upon consideration of, the following detailed description and drawings, wherein:

Figure l is a side elevation of the device constructed in accordance with my invention.

Figure 2 is a detailed view thereof showing the same partly disassembled. i Figure 5 is a longitudinal-section through the device showing the parts" assembled.

Referring to the drawings by numerals, .the usual shaft 1 extends from the latch in the usual manner and is provided with a series of apertures 33. l The hollow shank 4 of the knob 5 is adapted to fit over the outer end of the shaft '1 and, in the present instance, the end of the portion a: is provided with exterior screwthreads, thus forming a screwthreaded sleeve adapted to fit over the shaft 1. This screwthreaded sleeve is provided with a transverse opening 5 which is adapted to register with any of' the openings 3 and receive a locking pin 6 which extends transversely through the opening, as a is shown in Figure 3, thus holding the shank 4. of the knob on the shank 1. Theretaining ring 7 is provided with interior screwthreads and is adapted to be screwed on'the free end of the screwthreaded sleeve and cover the ends of the opening 5, thus main- I door knob attachments, and more particuf 1923. Serial 1%. 634,998,

' taining the locking pin 6 in position against accidental or casual displacement. The locking ring 8 is provided with screw threads and fits overthe opposite endiof the sleeve and is locked against the retaining ring 7 so that the two rings will be held if tightly against each other and against' the flange plate on thellatch mechanism.

In this manner theknob vis firmlyfheld to the shank l by the locking pin. 6 and. since the locking pinis entirely "covered by v the ring 7, it will be impossible to have the pin accidentally displaced as so oftenhap-- "pens in the type of fastening in use at pres ent.

7 The ring 7' may be movedlongitudinally H upon the shank of thedoor knob'5, sothat said ring 7 engages the door in order to take 70v 1" up loose play, which is caused due to. wear,

and the locking ring 8 adjusted against the ring 7 to bind andhold the ring? in ad- 'justed position;

Minor changes may be made in the details of construction without departingfrom the a I spirit of the invention .or the scope .ofthe claim hereunto appended.

What'Iclaimis: I i A' knob attaching device comprising in combination with a noncircular shaft hav the openings "in the shaft 7 and having ing openings passing transversely 'there, l

through, a shank adapted to it snugly'over the shaft and having openings adapted to register with the openings'in the shaft, a pin passing transversely through one ofits end portion received in the jopenin'gs of' the shank, 'the" shank being, screw threaded ,exteriorly from one: end and to a'point between its ends and beyond the" openings in'the shank, a retaining ringinternally threaded and adapted toengagethe I thread upon the shank and extend over the" openings of the shank and with one end edge disposed at the end of the shank and a locking ring internally threaded and engaging the thread of the shank and adapted to engage atits edge against the inner edge of the retaining ring. I

In testimony whereof, I'have afiixed my signature. is a MARTiN w. WESSENDORF. 

